sop / jwx

lib/JWX/JWE/KeyAlgorithm/A192GCMKWAlgorithm.php

Indentation +14 added lines, -14 removed lines

@@ -13,19 +13,19 @@
  */
 class A192GCMKWAlgorithm extends AESGCMKWAlgorithm
 {
-    /**
-     * {@inheritdoc}
-     */
-    public function algorithmParamValue(): string
-    {
-        return JWA::ALGO_A192GCMKW;
-    }
+	/**
+	 * {@inheritdoc}
+	 */
+	public function algorithmParamValue(): string
+	{
+		return JWA::ALGO_A192GCMKW;
+	}
 
-    /**
-     * {@inheritdoc}
-     */
-    protected function _keySize(): int
-    {
-        return 24;
-    }
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function _keySize(): int
+	{
+		return 24;
+	}
 }

lib/JWX/JWE/KeyAlgorithm/AESGCMKWAlgorithm.php

Indentation +143 added lines, -143 removed lines

@@ -22,147 +22,147 @@
  */
 abstract class AESGCMKWAlgorithm extends KeyManagementAlgorithm
 {
-    use RandomCEK;
-
-    /**
-     * Mapping from algorithm name to class name.
-     *
-     * @internal
-     *
-     * @var array
-     */
-    const MAP_ALGO_TO_CLASS = [
-        JWA::ALGO_A128GCMKW => A128GCMKWAlgorithm::class,
-        JWA::ALGO_A192GCMKW => A192GCMKWAlgorithm::class,
-        JWA::ALGO_A256GCMKW => A256GCMKWAlgorithm::class,
-    ];
-
-    /**
-     * Required IV size in bytes.
-     *
-     * @var int
-     */
-    const IV_SIZE = 12;
-
-    /**
-     * Authentication tag size in bytes.
-     *
-     * @var int
-     */
-    const AUTH_TAG_SIZE = 16;
-
-    /**
-     * Key encryption key.
-     *
-     * @var string
-     */
-    protected $_kek;
-
-    /**
-     * Initialization vector.
-     *
-     * @var string
-     */
-    protected $_iv;
-
-    /**
-     * Constructor.
-     *
-     * @param string $kek Key encryption key
-     * @param string $iv  Initialization vector
-     */
-    public function __construct(string $kek, string $iv)
-    {
-        if (strlen($kek) !== $this->_keySize()) {
-            throw new \LengthException('Invalid key size.');
-        }
-        if (self::IV_SIZE !== strlen($iv)) {
-            throw new \LengthException('Initialization vector must be 96 bits.');
-        }
-        $this->_kek = $kek;
-        $this->_iv = $iv;
-    }
-
-    /**
-     * Initialize from JWK.
-     *
-     * @param JWK    $jwk
-     * @param Header $header
-     *
-     * @throws \UnexpectedValueException
-     *
-     * @return self
-     */
-    public static function fromJWK(JWK $jwk, Header $header): KeyManagementAlgorithm
-    {
-        $jwk = SymmetricKeyJWK::fromJWK($jwk);
-        if (!$header->hasInitializationVector()) {
-            throw new \UnexpectedValueException('No initialization vector.');
-        }
-        $iv = $header->initializationVector()->initializationVector();
-        $alg = JWA::deriveAlgorithmName($header, $jwk);
-        if (!array_key_exists($alg, self::MAP_ALGO_TO_CLASS)) {
-            throw new \UnexpectedValueException("Unsupported algorithm '{$alg}'.");
-        }
-        $cls = self::MAP_ALGO_TO_CLASS[$alg];
-        return new $cls($jwk->key(), $iv);
-    }
-
-    /**
-     * Initialize from key encryption key with random IV.
-     *
-     * Key size must match the underlying cipher.
-     *
-     * @param string $key Key encryption key
-     *
-     * @return self
-     */
-    public static function fromKey(string $key): self
-    {
-        $iv = openssl_random_pseudo_bytes(self::IV_SIZE);
-        return new static($key, $iv);
-    }
-
-    /**
-     * {@inheritdoc}
-     */
-    public function headerParameters(): array
-    {
-        return array_merge(parent::headerParameters(),
-            [AlgorithmParameter::fromAlgorithm($this),
-                InitializationVectorParameter::fromString($this->_iv), ]);
-    }
-
-    /**
-     * Get the required key size.
-     *
-     * @return int
-     */
-    abstract protected function _keySize(): int;
-
-    /**
-     * {@inheritdoc}
-     */
-    protected function _encryptKey(string $key, Header &$header): string
-    {
-        [$ciphertext, $auth_tag] = AESGCM::encrypt($key, '', $this->_kek,
-            $this->_iv, self::AUTH_TAG_SIZE);
-        // insert authentication tag to the header
-        $header = $header->withParameters(
-            AuthenticationTagParameter::fromString($auth_tag));
-        return $ciphertext;
-    }
-
-    /**
-     * {@inheritdoc}
-     */
-    protected function _decryptKey(string $ciphertext, Header $header): string
-    {
-        if (!$header->hasAuthenticationTag()) {
-            throw new \RuntimeException(
-                "Header doesn't contain authentication tag.");
-        }
-        $auth_tag = $header->authenticationTag()->authenticationTag();
-        return AESGCM::decrypt($ciphertext, $auth_tag, '', $this->_kek, $this->_iv);
-    }
+	use RandomCEK;
+
+	/**
+	 * Mapping from algorithm name to class name.
+	 *
+	 * @internal
+	 *
+	 * @var array
+	 */
+	const MAP_ALGO_TO_CLASS = [
+		JWA::ALGO_A128GCMKW => A128GCMKWAlgorithm::class,
+		JWA::ALGO_A192GCMKW => A192GCMKWAlgorithm::class,
+		JWA::ALGO_A256GCMKW => A256GCMKWAlgorithm::class,
+	];
+
+	/**
+	 * Required IV size in bytes.
+	 *
+	 * @var int
+	 */
+	const IV_SIZE = 12;
+
+	/**
+	 * Authentication tag size in bytes.
+	 *
+	 * @var int
+	 */
+	const AUTH_TAG_SIZE = 16;
+
+	/**
+	 * Key encryption key.
+	 *
+	 * @var string
+	 */
+	protected $_kek;
+
+	/**
+	 * Initialization vector.
+	 *
+	 * @var string
+	 */
+	protected $_iv;
+
+	/**
+	 * Constructor.
+	 *
+	 * @param string $kek Key encryption key
+	 * @param string $iv  Initialization vector
+	 */
+	public function __construct(string $kek, string $iv)
+	{
+		if (strlen($kek) !== $this->_keySize()) {
+			throw new \LengthException('Invalid key size.');
+		}
+		if (self::IV_SIZE !== strlen($iv)) {
+			throw new \LengthException('Initialization vector must be 96 bits.');
+		}
+		$this->_kek = $kek;
+		$this->_iv = $iv;
+	}
+
+	/**
+	 * Initialize from JWK.
+	 *
+	 * @param JWK    $jwk
+	 * @param Header $header
+	 *
+	 * @throws \UnexpectedValueException
+	 *
+	 * @return self
+	 */
+	public static function fromJWK(JWK $jwk, Header $header): KeyManagementAlgorithm
+	{
+		$jwk = SymmetricKeyJWK::fromJWK($jwk);
+		if (!$header->hasInitializationVector()) {
+			throw new \UnexpectedValueException('No initialization vector.');
+		}
+		$iv = $header->initializationVector()->initializationVector();
+		$alg = JWA::deriveAlgorithmName($header, $jwk);
+		if (!array_key_exists($alg, self::MAP_ALGO_TO_CLASS)) {
+			throw new \UnexpectedValueException("Unsupported algorithm '{$alg}'.");
+		}
+		$cls = self::MAP_ALGO_TO_CLASS[$alg];
+		return new $cls($jwk->key(), $iv);
+	}
+
+	/**
+	 * Initialize from key encryption key with random IV.
+	 *
+	 * Key size must match the underlying cipher.
+	 *
+	 * @param string $key Key encryption key
+	 *
+	 * @return self
+	 */
+	public static function fromKey(string $key): self
+	{
+		$iv = openssl_random_pseudo_bytes(self::IV_SIZE);
+		return new static($key, $iv);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function headerParameters(): array
+	{
+		return array_merge(parent::headerParameters(),
+			[AlgorithmParameter::fromAlgorithm($this),
+				InitializationVectorParameter::fromString($this->_iv), ]);
+	}
+
+	/**
+	 * Get the required key size.
+	 *
+	 * @return int
+	 */
+	abstract protected function _keySize(): int;
+
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function _encryptKey(string $key, Header &$header): string
+	{
+		[$ciphertext, $auth_tag] = AESGCM::encrypt($key, '', $this->_kek,
+			$this->_iv, self::AUTH_TAG_SIZE);
+		// insert authentication tag to the header
+		$header = $header->withParameters(
+			AuthenticationTagParameter::fromString($auth_tag));
+		return $ciphertext;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function _decryptKey(string $ciphertext, Header $header): string
+	{
+		if (!$header->hasAuthenticationTag()) {
+			throw new \RuntimeException(
+				"Header doesn't contain authentication tag.");
+		}
+		$auth_tag = $header->authenticationTag()->authenticationTag();
+		return AESGCM::decrypt($ciphertext, $auth_tag, '', $this->_kek, $this->_iv);
+	}
 }

lib/JWX/JWE/KeyAlgorithm/A128GCMKWAlgorithm.php

Indentation +14 added lines, -14 removed lines

@@ -13,19 +13,19 @@
  */
 class A128GCMKWAlgorithm extends AESGCMKWAlgorithm
 {
-    /**
-     * {@inheritdoc}
-     */
-    public function algorithmParamValue(): string
-    {
-        return JWA::ALGO_A128GCMKW;
-    }
+	/**
+	 * {@inheritdoc}
+	 */
+	public function algorithmParamValue(): string
+	{
+		return JWA::ALGO_A128GCMKW;
+	}
 
-    /**
-     * {@inheritdoc}
-     */
-    protected function _keySize(): int
-    {
-        return 16;
-    }
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function _keySize(): int
+	{
+		return 16;
+	}
 }

lib/JWX/JWE/KeyAlgorithm/A256GCMKWAlgorithm.php

Indentation +14 added lines, -14 removed lines

@@ -13,19 +13,19 @@
  */
 class A256GCMKWAlgorithm extends AESGCMKWAlgorithm
 {
-    /**
-     * {@inheritdoc}
-     */
-    public function algorithmParamValue(): string
-    {
-        return JWA::ALGO_A256GCMKW;
-    }
+	/**
+	 * {@inheritdoc}
+	 */
+	public function algorithmParamValue(): string
+	{
+		return JWA::ALGO_A256GCMKW;
+	}
 
-    /**
-     * {@inheritdoc}
-     */
-    protected function _keySize(): int
-    {
-        return 32;
-    }
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function _keySize(): int
+	{
+		return 32;
+	}
 }